Objectives: The purpose of this research was to examine radon exposure in terms of the relationship between the living environment and indoor radon concentrations among vulnerable households. Methods: Nationwide, 1,129 subjects were selected using personal questionnaires for adequately understanding the living environment, installation of E-PERM radon gas detectors, and investigation of the structure of the housing. Results: The mean concentration of indoor radon for all subjects was (GM

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4.

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United Nations Scientific Committee on the Effects of Atomic Radiation(UNSCEAR). Sources, effects and risks of ionizing radiation. Report to the General Assembly, with annexes. United Nations. New York. 2000.